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Computation of the two-dimensional flow in a laminar boundary layer

Description: A comparison is made of the boundary-layer flow computed by the approximate method developed by K. Pohlhausen with the exact solutions which have been published for several special cases. A modification of Pohlhausen's method has been developed which extends the range of application at the expense of some decrease in the accuracy of the approximations.
Date: May 1934
Creator: Dryden, Hugh L.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Full-scale drag tests of landing lamps

Description: "Drag tests were conducted in the N.A.C.A. full-scale wind tunnel on full-scale models of two Army Air Corps type A-6 landing lamps mounted on an 8 by 48 foot airfoil. Drag measurements were made with the lamps in the leading edge and attached to the lower surface at the 5 and 10 percent chord positions. The drag of the lamps when faired into the airfoil was also measured. The results show that at 100 miles per hour and at the angle of minimum drag of the airfoil the unaired lamps in the leadin… more
Date: May 1934
Creator: Dearborn, C. H.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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High-Speed Aircraft

Description: This report details the designs of high-speed aircraft from various countries from 1931 on, with special emphasis on the United States and Germany.
Date: May 1934
Creator: Schrenk, M.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Manganese: Its Occurrence, Milling, and Metallurgy; Part 1

Description: Report issued by the U.S. Bureau of Mines discussing the "occurrence, milling, and metallurgy of manganese in the United States" (p. 1). Different properties and compounds of manganese are also discussed. This report includes a map, tables, illustrations, and photographs.
Date: May 1934
Creator: Dean, Reginald S.; DeVaney, Fred D. & Coghill, Will H.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Torsional Stresses in Box Beams With Cross Sections Partially Restrained Against Warping

Description: "The present report gives a method for computing the torsion of boxes with thin shear-resistant or simply tension-resistant walls under any torsional load, support and dimension. The final stress condition is developed from that of a principal system with unconstrained sectional warping corresponding to Bredt's formula and an additional stress condition due to constrained cross-sectional warping. This is computed by means of the deflection condition of the principal system from a statically ind… more
Date: May 1934
Creator: Ebner, Hans
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Wind-Tunnel Measurements of Air Loads on Split Flaps

Description: Note presenting tests in a wind tunnel to determine the control forces and air loads acting on split flaps. Clark Y wing models were used with two different sizes of full-span split flaps, one with a medium chord and one with a narrow chord. The results indicated that at angles of attack and flap deflections for maximum lift, the lift loads on the split flaps were only 5 percent and 9 percent of the total lift for the narrow and medium-chord flaps respectively.
Date: May 1934
Creator: Wenzinger, Carl J.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Aircraft Power-Plant Instruments

Description: From Summary: "The report includes a description of the commonly used types and some others, the underlying principle utilized in the design, and some design data. The inherent errors of the instrument, the methods of making laboratory tests, descriptions of the test apparatus, and data in considerable detail in the performance of commonly used instruments are presented. Standard instruments and, in cases where it appears to be of interest, those used as secondary standards are described."
Date: May 31, 1933
Creator: Sontag, Harcourt & Brombacher, W. G.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Negative Thrust and Torque Characteristics of an Adjustable-Pitch Metal Propeller

Description: This report presents the results of a series of negative thrust and torque measurements made with a 4 foot diameter model of a conventional aluminum-alloy propeller. The tests were made in the 20-foot propeller-research tunnel of the National Advisory Committee for Aeronautics. The results show that the negative thrust is considerably affected by the shape and size of the body behind the propeller, that the maximum negative thrust increases with decrease in blade-angle setting, and that the dra… more
Date: May 23, 1933
Creator: Hartman, Edwin P.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Experimental Verification of the Theory of Wind-Tunnel Boundary Interference

Description: "The results of an experimental investigation on the boundary-correction factor are presented in this report. The values of the boundary-correction factor from the theory, which at the present time is virtually completed, are given in the report for all conventional types of tunnels. With the isolation of certain disturbing effects, the experimental boundary-correction factor was found to be in satisfactory agreement with the theoretically predicted values, thus verifying the soundness and suff… more
Date: May 18, 1933
Creator: Theodorsen, Theodore & Silverstein, Abe
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Stability of Thin-Walled Tubes Under Torsion

Description: "In this report a theoretical solution is developed for the torsion on a round thin-walled tube for which the walls become unstable. The results of this theory are given by a few simple formulas and curves which cover all cases. The differential equations of equilibrium are derived in a simpler form than previously found, it being shown that many items can be neglected" (p. 3).
Date: May 5, 1933
Creator: Donnell, L. H.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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[Commencement Event Program for North Texas State Teachers College, May 1933]

Description: Event program for the North Texas State Teachers College 1933 Commencement. Printed on the program are the words , "North Texas State Teachers College. Commencement 1933. Tuesday, May 23, 8:00 P.M.---President's Reception to Seniors and Faculty. Saturday, May 27, 8:00 A.M.---Mary Arden Breakfast. 6:30 P.M.---Alumni Banquet, Mary Arden Lounge. Sunday, May 28, 11:00 A.M.---Baccalaureate Sermon. Wednesday, May 31, 10:00 A.M.---Final Convocation."
Date: May 1933
Creator: North Texas State Teachers College
Item Type: Refine your search to only Pamphlet
Partner: UNT Libraries Special Collections
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[Commencement Program for North Texas State Teachers College, May 28, 1933]

Description: Commencement program for the North Texas State Teachers College in May 1933. Printed on the cover are the words, "North Texas State Teachers College. The Baccalaureate Service. Nineteen hundred and thirty-three. Sunday Morning. May the twenty-eight at eleven o'clock. The Auditorium." The program contains the order of service for the commencement.
Date: May 1933
Creator: North Texas State Teachers College
Item Type: Refine your search to only Pamphlet
Partner: UNT Libraries Special Collections
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[Commencement Program for North Texas State Teachers College, May 31, 1933]

Description: Commencement program for the 1933 May Commencement Exercise for the North Texas State Teachers College. Printed on the cover are the words, " North Texas State Teachers College. Denton, Texas. Commencement Exercise. Wednesday Morning. May the thirty-first at ten o'clock. Nineteen hundred and thirty-three. The Auditorium." The program includes the order of service and a list of graduates.
Date: May 1933
Creator: North Texas State Teachers College
Item Type: Refine your search to only Pamphlet
Partner: UNT Libraries Special Collections
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The Development of an Electrolytic Method for the Determination of Inclusions in Plain-Carbon Steels

Description: Report issued by the U.S. Bureau of Mines on the specifications and development of methods used in plain-carbon steel production. Proposed methods and experiment results are presented. This report includes tables, graphs, and photographs.
Date: May 1933
Creator: Fitterer, G. R.; Sockman, B. E.; Krockenberger, E. A.; Meneilly, R. B.; Marshall, E. W., Jr. & Eckel, J. F.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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The Dewoitine D.500 Pursuit Airplane (French): An All-Metal Cantilever Low-Wing Monoplane

Description: Circular describing the Dewoitine D.500 pursuit airplane, which is an all-metal cantilever low-wing monoplane. Details of the fuselage, cockpit, control surfaces, weapons, landing gear, fuel tanks, wing, engine, characteristics, performances, drawings, and photographs are provided.
Date: May 1933
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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The Effect of Rivet Heads on the Characteristics of a 6 by 36 Foot Clark Y Metal Airfoil

Description: "An investigation was conducted in the N.A.C.A. full-scale wind tunnel to determine the effects of exposed rivet heads on the aerodynamic characteristics of a metal-covered 6 by 36 foot Clark Y airfoil. Lead punching simulating 1/8 inch rivet heads were attached in full-span rows at a pitch of 1 inch at various chord positions. Tests were made at velocities varying from 40 to 120 miles per hour to investigate the scale effect" (p. 1).
Date: May 1933
Creator: Dearborn, Clinton H.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Experiments With Needle Bearings

Description: Experiments and results are presented in testing needle bearings, especially in comparison with roller bearings. Reduction in coefficient of friction is discussed as well as experimental methods and recording devices.
Date: May 1933
Creator: Ferretti, Pericle
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Flight-Test Data on the Static Fore-and-Aft Stability of Various German Airplanes

Description: "The static longitudinal stability of an airplane with locked elevator is usually determined by analysis and model tests. The present report proposes to supply the results of such measurements. The method consisted of recording the dynamic pressure versus elevator displacement at different center-of-gravity positions in unaccelerated flight" (p. 1).
Date: May 1933
Creator: Hübner, Walter
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Full-Scale Wind-Tunnel Research on Tail Buffeting and Wing-Fuselage Interference of a Low-Wing Monoplane

Description: Some preliminary results of full scale wind tunnel testing to determine the best means of reducing the tail buffeting and wing-fuselage interference of a low-wing monoplane are given. Data indicating the effects of an engine cowling, fillets, auxiliary airfoils of short span, reflexes trailing edge, propeller slipstream, and various combinations of these features are included. The best all-round results were obtained by the use of fillets together with the National Advisory Committee for Aerona… more
Date: May 1933
Creator: Hood, Manley J. & White, James A.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Future Problems of Soaring Flight: Report of 1932 Rhon Soaring Contest

Description: Memorandum presenting two reports. One is a description of the 1932 Rhön Soaring Contest and some of the problems encountered by the aircraft in the contest. The other is a description of films of cloud formations that were presented at the same contest.
Date: May 1933
Creator: Georgii, Walter & Eisenlohr, Roland
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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